Traditional Culture Encyclopedia - Traditional virtues - What is the composition of standard football?
What is the composition of standard football?
It is basically a No.5 ball, which is round and made of leather or other suitable materials. The circumference of the most classic football should not exceed 70 cm (28 inches) and should not be less than 68 cm (27 inches). At the beginning of the game, the weight of the ball shall not exceed 450g (16 oz) and shall not be less than 4 10/0g (14 oz). The pressure of the ball is 0.6 to 1. 1 atmospheric pressure at sea level (600g to1100g per square centimeter = 8.5 lbs to 15.6 lbs per square inch).
- Previous article:What can be described by the flow chart is that
- Next article:What is the structure of China's current financial system?
- Related articles
- How big is the impact of e-commerce on the real economy?
- What are the SEO optimization points of websites in different periods?
- Advantages and disadvantages of abolishing the death penalty
- What are the affordable housing in Wuhan in 2009?
- What is the meaning of chorus?
- Some Understandings on the Development Laws of Mineral Exploration in Geological Work
- How far is the refrigerator from the wall? Saving method of refrigerator
- Samadhi line or Sanwei line
- Clothing characteristics of all ethnic groups
- A Comparative Study of Using Traditional Teaching Methods and Task-Based Teaching Methods in College English Intensive Reading Classes